From patchwork Tue May 30 22:48:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Judith Mendez X-Patchwork-Id: 687017 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E48A0C7EE33 for ; Tue, 30 May 2023 22:48:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233550AbjE3Ws4 (ORCPT ); Tue, 30 May 2023 18:48:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230256AbjE3Wsu (ORCPT ); Tue, 30 May 2023 18:48:50 -0400 Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F2E92EC; Tue, 30 May 2023 15:48:47 -0700 (PDT) Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 34UMmLwD002590; Tue, 30 May 2023 17:48:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1685486901; bh=lRjzC1PXGwTxRNrfRpHXIWdTM8CL+XACgMhEM8GBJrQ=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=tTURIePUlPnCFNySKF9H/lJizOlYT8OwW7ENuwmdLqw+W/PGlDzr0mQw9PcQPMiRO pkJBoHmqwSEPn8TQk1g1E1t/5kYWs1fTkpEupQtq7CSPR5/3XQTh5oLUA4TKavvPVV vl8AVeXjFrRMAeo6QIyiuFfnDWDMJRNIE+KTbax0= Received: from DLEE107.ent.ti.com (dlee107.ent.ti.com [157.170.170.37]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 34UMmL8B036335 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 30 May 2023 17:48:21 -0500 Received: from DLEE100.ent.ti.com (157.170.170.30) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Tue, 30 May 2023 17:48:20 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Tue, 30 May 2023 17:48:20 -0500 Received: from uda0498204.dhcp.ti.com (ileaxei01-snat.itg.ti.com [10.180.69.5]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 34UMmKxW112899; Tue, 30 May 2023 17:48:20 -0500 From: Judith Mendez To: Chandrasekar Ramakrishnan , CC: Wolfgang Grandegger , Marc Kleine-Budde , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , , , Schuyler Patton , Tero Kristo , Rob Herring , Krzysztof Kozlowski , , Oliver Hartkopp , Simon Horman , Conor Dooley , Tony Lindgren Subject: [PATCH v8 1/2] dt-bindings: net: can: Remove interrupt properties for MCAN Date: Tue, 30 May 2023 17:48:19 -0500 Message-ID: <20230530224820.303619-2-jm@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230530224820.303619-1-jm@ti.com> References: <20230530224820.303619-1-jm@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On AM62x SoC, MCANs on MCU domain do not have hardware interrupt routed to A53 Linux, instead they will use software interrupt by timer polling. To enable timer polling method, interrupts should be optional so remove interrupts property from required section and add an example for MCAN node with timer polling enabled. Reviewed-by: Conor Dooley Acked-by: Krzysztof Kozlowski Signed-off-by: Judith Mendez Reviewed-by: Tony Lindgren --- Changelog: v8: 1. No changes v7: 1. No changes v6: 1. No changes v5: 1. Remove poll-interval 2. Remove oneOf that selects interrupts/interrupt-names or poll-interval v3: 1. Update binding poll-interval description 2. Add oneOf to select interrupts/interrupt-names or poll-interval v2: 1. Add poll-interval property to enable timer polling method 2. Add example using poll-interval property --- .../bindings/net/can/bosch,m_can.yaml | 20 +++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml index 67879aab623b..bb518c831f7b 100644 --- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml +++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml @@ -122,8 +122,6 @@ required: - compatible - reg - reg-names - - interrupts - - interrupt-names - clocks - clock-names - bosch,mram-cfg @@ -132,6 +130,7 @@ additionalProperties: false examples: - | + // Example with interrupts #include can@20e8000 { compatible = "bosch,m_can"; @@ -149,4 +148,21 @@ examples: }; }; + - | + // Example with timer polling + #include + can@20e8000 { + compatible = "bosch,m_can"; + reg = <0x020e8000 0x4000>, <0x02298000 0x4000>; + reg-names = "m_can", "message_ram"; + clocks = <&clks IMX6SX_CLK_CANFD>, + <&clks IMX6SX_CLK_CANFD>; + clock-names = "hclk", "cclk"; + bosch,mram-cfg = <0x0 0 0 32 0 0 0 1>; + + can-transceiver { + max-bitrate = <5000000>; + }; + }; + ...